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United States Patent | 5,040,975 |
Ettwein ,   et al. | August 20, 1991 |
An improved method is proposed for releasing brackets from bonded joints whereby also ceramic brackets can be removed. Herein, the layer of bonding agent is subjected to pulse-shaped heat input by transfer of heat from an instrument to the bracket, with a safety device allowing only a suitable amount of heat for the respective type of bracket to be transferred.
Inventors: | Ettwein; Karl-Heiner (Remchingen, DE); Rohlcke; Friedrich-Wilhelm (Bilfingen, DE); Bauerle; Heinz (Ispringen, DE); Reichelt; Karl-Heinz (Keltern, DE); Bazner; Bernhard (Pforzheim, DE) |
Assignee: | Dentaurum J. P. Winkelstroeter KG (Ispringen, DE) |
Appl. No.: | 521136 |
Filed: | May 9, 1990 |
May 13, 1989[DE] | 3915806 |
Current U.S. Class: | 433/3; 433/27; 433/32 |
Intern'l Class: | A61C 003/00; A61C 001/00; A61C 019/00 |
Field of Search: | 433/2,3,24,27,32 |
4155164 | May., 1979 | White | 433/3. |
4455138 | Jun., 1984 | Sheridan | 433/3. |
4824366 | Apr., 1989 | Hohmann et al. | 433/32. |
4907965 | Mar., 1990 | Martin | 433/3. |
John J. Sheridan, D.D.S., M.S.D. et al., "Electrothermal debracketing, Part I, An in vitro study", Am. J. Orthod., Jan. 1986, pp. 21-27, (vol. 89). John J. Sheridan, D.D.S., M.S.D. et al., "Electrothermal debracketing, Part II, An in vivo study", Am. J. Orthod., 1986, pp. 141-145. Klaus-Dieter Gerkhardt et al., "Elektrothermische Brackettentfernung durch Erweichung des Klebers mittels Hochstromimpuls"; Prakt. Kieferorthop. 2, pp. 145-148 (1988). Pamphlet of Scheu-Dental Company published in Oct. 1988. |